Three identical-looking wires P, Q and R were tested at room temperature
PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity
Problem
Three identical-looking wires P, Q and R were tested at room temperature. For P the readings were 2 V, 0.40 A and later 4 V, 0.80 A. For Q they were 2 V, 0.30 A and 4 V, 0.70 A. For R they were 2 V, 0.25 A and 4 V, 0.50 A. Identify the wire(s) that obey Ohm’s law.